Patent GB-205403-A (GB)
Title: Improvements in fog signalling and course sounding apparatus for ships
IPC: G08B3/02
Filed: 1922-12-22
Abstract: 205,403. Jones, D. L. Dec. 22, 1922. Morse and like code signal transmitting arrangements.-In apparatus for repeatedly sounding fog and course signals of the type in which a drum &c. carries sets of cams adapted to operate controlling devices which, when set to a particular marking on an index, operate the circuit of a whistle &c. to give a characteristic signal, each controlling device carries a vertically moving plunger which as it rises and falls operates the circuit. A drum 7 mounted in bearings 3 is driven by a motor and carries a number of cams 8 arranged in sets to represent the various signals. A plate 9 arranged on the casing 2 provides an index of the signals corresponding to the arrangement of cams on the drum. Course - signals are selected by a controller F, which comprises a carrier 24 slidably mounted on bars 22, 23 and having a handle 31 which passes through a slot 2' in the casing 2. The handle 31 has a spring catch 32 adapted to engage one or other of the holes 75 below the index of course markings 10. Contacts 25, 26 mounted on the carrier 24 are closed by a plunger stem 54, when the latter co-operates with the cams 8. to operate the electromagnet 18 of the whistle &c., the circuit being closed by way of the wipers 28, 29, which are mounted on the carrier and contact with the insulated rods 20, 21. Two parallel levers 58 are pivoted to supports 56 on the carrier 24, each lever carrying a pin 59, which engages with the upper end of the plunger stem 54. When the plunger is raised by the cams, the front ends of the levers 58 cause a piercer to descend and mark a flexible strip 76 which passes from a spool 77 over a roller 78. A second controller G, similar in all respects to the controller F, is provided for selecting fog or S.O.S. signals. Means for indicating when either of the controllers F, G is in co-operative relation with its cams comprises plunger devices H, K adapted to co-operate with additional cams provided on the drum 7. When device H is operated the plunger closes the circuit of a lamp 115 and also engages a pin 18 on a lever 119 to raise a shutter 16 and mask the opening 14. Dis- - engagement between the plunger and cam extinguishes the lamp and causes the shutter to fall and bring into view a disc or window. The arrangement is such that as soon as the cams controlling the course signals have moved from engagement with the plunger stem 54, the opening 14 is masked and the lamp 115 lit, but when the signal is commenced, the disc is brought into view and the lamp is extinguished. The device K constructed and operating similarly to the device H, is associated with the controller G. The switch 133 enables the controllers F, G to be put in circuit with signalling lights instead of a whistle and a push 134 is provided for hand operation of the whistle. In a modification a controller is provided for each row of signal cams. Each controller is pivotally mounted on a fixed rod and is arranged to be moved into operative relation with the corresponding cams on the drum by a manually operated pushing or tripping device. Specification 105,369 is referred to.